AMOLED array substrate, method for manufacturing the same and display device

Abstract

The present invention relates to an AMOLED array substrate, a manufacturing method thereof and a display device. The AMOLED array substrate includes at least one first auxiliary line provided in the same layer as but not intersecting with pixel electrodes; and at least one second auxiliary line provided in the same layer as source and drain electrodes but not intersecting with data lines and the source and drain electrodes, wherein: projections of the first and second auxiliary lines on plate electrode are within projection of pixel define layer and at least partially overlap; and the first auxiliary line is electrically connected to the second auxiliary line via a first via hole and to the plate electrode via a second via hole formed in pixel define layer, wherein projection of the first via hole on the plate electrode is within overlapped projection of the first and second auxiliary lines.

What is claimed is: 
     
       1. An AMOLED array substrate, comprising:
 a plate electrode, which is electrically connected to an electrode lead provided on the periphery of the plate electrode; 
 a plurality of pixel electrodes arranged in an array; 
 an organic light emitting body, which is provided between the plurality of pixel electrodes and the plate electrode; 
 at least one first auxiliary line, which is provided in the same layer as the pixel electrodes but does not intersect with the pixel electrodes; and 
 at least one second auxiliary line, which is provided in the same layer as source and drain electrodes of the AMOLED array substrate but does not intersect with data lines and the source and drain electrodes of the AMOLED array substrate, 
 wherein: 
 projections of the first auxiliary line and the second auxiliary line on the plate electrode are within projection of a pixel define layer of the AMOLED array substrate on the plate electrode and at least partially overlap with each other; 
 the first auxiliary line is electrically connected to the second auxiliary line via a first via hole and is electrically connected to the plate electrode via a second via hole formed in the pixel define layer of the AMOLED array substrate, wherein projection of the first via hole on the plate electrode is within overlapped projection of the first auxiliary line and the second auxiliary line; and 
 projection of the second via hole on the plate electrode is within the overlapped projection of the first auxiliary line and the second auxiliary line, and the projection of the first via hole on the plate electrode is completely within the projection of the second via hole on the plate electrode. 
 
     
     
       2. The AMOLED array substrate according to  claim 1 , wherein,
 the at least one first auxiliary line includes a plurality of first auxiliary lines, and the first auxiliary lines are parallel to gate lines of the AMOLED array substrate; 
 the at least one second auxiliary line includes a plurality of second auxiliary lines, and the second auxiliary lines are parallel to the data lines of the AMOLED array substrate; and 
 projections of the plurality of first auxiliary lines and the plurality of second auxiliary lines on the plate electrode form a mesh pattern including a plurality of meshes. 
 
     
     
       3. The AMOLED array substrate according to  claim 1 , wherein,
 each first auxiliary line is provided correspondingly to one gate line, and projections of the first auxiliary line and the corresponding gate line on the plate electrode at least partially overlap. 
 
     
     
       4. The AMOLED array substrate according to  claim 1 , wherein,
 the AMOLED array substrate further includes a passivation layer provided between a layer where the source and drain electrodes are provided and the pixel electrodes, and the first via hole passes through the passivation layer to electrically connect the first auxiliary line to the second auxiliary line. 
 
     
     
       5. The AMOLED array substrate according to  claim 1 , wherein,
 the electrode lead is provided around the entire periphery of the plate electrode; and 
 at least one end of each auxiliary line is electrically connected to the electrode lead. 
 
     
     
       6. The AMOLED array substrate according to  claim 1 , wherein,
 the overlapped projection of the at least one first auxiliary line and the at least one second auxiliary line is at least positioned at a center area of the plate electrode. 
 
     
     
       7. A display device, comprising the AMOLED array substrate according to  claim 1 . 
     
     
       8. The AMOLED array substrate according to  claim 2 , wherein,
 the pixel electrodes and the meshes of the mesh pattern are in one-to-one correspondence, and projection of each pixel electrode on the plate electrode is within the corresponding mesh of the mesh pattern. 
 
     
     
       9. The AMOLED array substrate according to  claim 4 , wherein,
 the AMOLED array substrate further includes a planarization layer provided between the passivation layer and the pixel electrodes, and the first via hole passes through the passivation layer and the planarization layer to electrically connect the first auxiliary line to the second auxiliary line. 
 
     
     
       10. A method for manufacturing an AMOLED array substrate, wherein:
 the AMOLED array substrate comprises: 
 a plurality of pixel electrodes arranged in an array; 
 a plate electrode electrically connected to an electrode lead provided on the periphery of the plate electrode; and 
 an organic light emitting body provided between the plurality of pixel electrodes and the plate electrode, and 
 the method comprises steps of: 
 forming, in the same layer as the pixel electrodes, at least one first auxiliary line that does not intersect with the pixel electrodes; 
 forming, in the same layer as source and drain electrodes of the AMOLED array substrate, at least one second auxiliary line that does not intersect with date lines and the source and drain electrodes of the AMOLED array substrate, wherein projections of the first auxiliary line and the second auxiliary line on the plate electrode are within projection of a pixel define layer of the AMOLED array substrate on the plate electrode and at least partially overlap with each other; 
 forming a first via hole for electrically connecting the first auxiliary line to the second auxiliary line at a position corresponding to overlapped projection of the first auxiliary line and the second auxiliary line; and 
 forming, in the pixel define layer of the AMOLED array substrate, a second via hole for electrically connecting the second auxiliary line to the plate electrode, wherein the second via hole is formed at a position corresponding to the overlapped projection of the first auxiliary line and the second auxiliary line, and the projection of the first via hole on the plate electrode is completely within the projection of the second via hole on the plate electrode. 
 
     
     
       11. The method according to  claim 10 , wherein,
 the step of forming at least one first auxiliary line comprises forming a plurality of first auxiliary lines, such that the first auxiliary lines are parallel to gate lines of the AMOLED array substrate; and 
 the step of forming at least one second auxiliary line comprises forming a plurality of second auxiliary lines, such that the second auxiliary lines are parallel to the data lines of the AMOLED array substrate, and projections of the plurality of first auxiliary lines and the plurality of second auxiliary lines on the plate electrode form a mesh pattern including a plurality of meshes. 
 
     
     
       12. The method according to  claim 10 , wherein,
 each first auxiliary line is formed correspondingly to one gate line, and projections of the first auxiliary line and the corresponding gate line on the plate electrode at least partially overlap. 
 
     
     
       13. The method according to  claim 10 , further comprising a step of:
 forming a passivation layer between a layer where the source and drain electrodes are provided and the pixel electrodes, wherein the first via hole passes through the passivation layer to electrically connect the first auxiliary line to the second auxiliary line. 
 
     
     
       14. The method according to  claim 10 , wherein,
 the first auxiliary line and the pixel electrodes are made of a same material and are simultaneously formed by one patterning process; and 
 the second auxiliary line and the source and drain electrodes are made of a same material and are simultaneously formed by one patterning process; and 
 optionally, the method further comprises a step of: 
 shielding the second via hole to avoid the organic light emitting body from entering the second via hole, while applying the organic light emitting body. 
 
     
     
       15. The method according to  claim 10 , wherein,
 the electrode lead is provided around the entire periphery of the plate electrode; and 
 the method further comprises a step of electrically connecting at least one end of each auxiliary line to the electrode lead. 
 
     
     
       16. The method according to  claim 10 , wherein,
 the formed at least one first auxiliary line includes the first auxiliary line whose projection on the plate electrode passes a center area of the plate electrode, and the formed at least one second auxiliary line includes the second auxiliary line whose projection on the plate electrode passes the center area of the plate electrode. 
 
     
     
       17. The method according to  claim 11 , wherein,
 the pixel electrodes are formed to be in one-to-one correspondence with the meshes of the mesh pattern, and projection of each pixel electrode on the plate electrode is within the corresponding mesh of the mesh pattern formed by the first auxiliary lines and the second auxiliary lines. 
 
     
     
       18. The method according to  claim 13 , further comprising a step of:
 forming a planarization layer between the passivation layer and the pixel electrodes, wherein the first via hole passes through the passivation layer and the planarization layer to electrically connect the first auxiliary line to the second auxiliary line.